The cheapest graphics card you can play it on is an ATI Radeon HD 4850. But, according to the developers the recommended graphics card is an AMD Radeon HD 7850. Super Grav system requirements state that you will need at least 2 GB of RAM. Additionally, the game developers recommend somewhere around 4 GB of RAM in your system. To play Super Grav you will need a minimum CPU equivalent to an Intel Core 2 Duo T7250. Whereas, an Intel Core i5-650 is recommended in order to run it. You will need at least 256 MB of free disk space to install Super Grav. Make sure your have 1 GB of free disk space in order to install Super Grav.
Super Grav will run on PC system with Windows XP / Windows Vista / Windows 7 and upwards. Additionally it has Mac and Linux versions.